Google (and every other major search engine) already provide a way, i.e. reverse DNS lookup, to authentic bot ownership: https://support.google.com/webmasters/

Google (and every other major search engine) already provide a way, i.e. reverse DNS lookup, to authentic bot ownership: https://support.google.com/webmasters/answer/80553?hl=en https://support.google.com/webmasters/answer/80553?hl=en AFAIK no content provider actually does this check though.